package yanc.app

import grails.transaction.Transactional

import java.awt.*
import java.awt.image.BufferedImage

@Transactional
class UserService {
    def BufferedImage image
    def String str
    def static char[] code = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789".toCharArray()
    def static final String SESSION_CODE_NAME = "code"

    def add(User user) {
        def flag = true
        if (!user.save()) {
            user.errors.allErrors.each {
                flag = false
                println it
            }
        }
        return flag
    }

    /**
     * MD5加密运算。
     *
     * @param str 待运算的字符串。
     * @return 加密内容。
     */
    protected String getMD5(String str) {
        return str.encodeAsMD5().toString().toUpperCase()
    }

    def String checkCode(String sessionCode, String code) {
        def str = ""
        if (sessionCode.isEmpty()) {
            str = "1"
        }
        if (code.isEmpty()) {
            str = "1"
        }
        if (sessionCode.equalsIgnoreCase(code)) {
            str = "0"
        } else {
            str = "1"
        }
    }

    def BufferedImage getImage() {
        return this.image
    }

    /*
     * 取得图片的验证码
     */

    def String getStr() {
        return this.str
    }

    def get() {
        // 在内存中创建图象
        int width = 85, height = 20
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
        // 获取图形上下文
        Graphics g = image.getGraphics()
        // 生成随机类
        Random random = new Random()
        // 设定背景色
        g.setColor(getRandColor(200, 250))
        g.fillRect(0, 0, width, height)
        // 设定字体
        g.setFont(new Font("Times New Roman", Font.PLAIN, 18))
        // 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
        g.setColor(getRandColor(160, 200))
        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width)
            int y = random.nextInt(height)
            int xl = random.nextInt(12)
            int yl = random.nextInt(12)
            g.drawLine(x, y, x + xl, y + yl)
        }
        // 取随机产生的认证码(4位数字)
        String sRand = ""
        for (int i = 0; i < 4; i++) {
            String rand = String.valueOf(code[random.nextInt(code.length)])
            sRand += rand
            // 将认证码显示到图象中
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)))
            // 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
            g.drawString(rand, 13 * i + 6, 16)
        }
        // 赋值验证码
        this.str = sRand

        // 图象生效
        g.dispose();
        // ByteArrayInputStream input = null;
        // ByteArrayOutputStream output = new ByteArrayOutputStream();
        // try {
        // ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
        // ImageIO.write(image, "JPEG", imageOut);
        // imageOut.close();
        // input = new ByteArrayInputStream(output.toByteArray());
        // } catch (Exception e) {
        // System.out.println("验证码图片产生出现错误：" + e.toString());
        // }
        // this.image = input
        this.image = image
    }

    /*
     * 给定范围获得随机颜色
     */

    def Color getRandColor(int fc, int bc) {
        Random random = new Random()
        if (fc > 255)
            fc = 255
        if (bc > 255)
            bc = 255
        int r = fc + random.nextInt(bc - fc)
        int g = fc + random.nextInt(bc - fc)
        int b = fc + random.nextInt(bc - fc)
        return new Color(r, g, b)
    }
    def updateUser(String tellphone,String gender,String age,String address,User user,String name){
        user.telephone = tellphone
        user.gender = gender
        user.age = age
        user.name = name
        user.address = address
        user.save()
    }
}
